Cell phone cameras are, on the whole, a good thing. They allow people to take pictures easily, which is good for being able to save personal memories, but also for taking pictures and documenting things that are happening around us (like crimes).
As far as privacy goes, these cameras simply make us rethink what privacy means. After all, a cell phone camera can only be used to take a picture of you when you are in some public place (at least some place with other people). Whenever you are in such a place, you shouldn't really expect to have your privacy maintained anyway.
So, cell phone cameras are basically good, even if they do make us have to realize that anything we do while around other people can be recorded.